GODT-1553: RPC definition and mocks

WIP: updates

WIP: cache on disk and autostart.

WIP: mail, keychain and more.

WIP: updated grpc version in go mod file.

WIP: user list.

WIP: RPC service placeholder

WIP: test C++ RPC client skeleton.

Other: missing license script update.

WIP: use Qt test framework.

WIP: test for app and login calls.

WIP: test for update & cache on disk calls.

WIP: tests for mail settings calls.

WIP: all client tests.

WIP: linter fixes.

WIP: fix missing license link.

WIP: update dependency_license script for gRPC and protobuf.

WIP: removed unused file.

WIP: app & login event streaming tests.

WIP: update event stream tests.

WIP: completed event streaming tests.

internal/rpc/server.go

@@ -0,0 +1,121 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.Bridge.
+//
+// Proton Mail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+package rpc
+
+import (
+	"crypto/tls"
+	"net"
+
+	"github.com/sirupsen/logrus"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+//go:generate protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative bridge_rpc.proto
+
+//goland:noinspection SpellCheckingInspection
+const (
+	serverCert = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+	serverKey = `-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----`
+)
+
+// Server is the RPC server struct.
+type Server struct {
+	grpcServer *grpc.Server
+	listener   net.Listener
+	log        *logrus.Entry
+}
+
+// NewServer returns a new RPC server.
+func NewServer() *Server {
+	log := logrus.WithField("pkg", "rpc")
+
+	cert, err := tls.X509KeyPair([]byte(serverCert), []byte(serverKey))
+	if err != nil {
+		log.WithError(err).Error("could not create key pair")
+		panic(err)
+	}
+
+	grpcServer := grpc.NewServer(grpc.Creds(credentials.NewTLS(&tls.Config{
+		Certificates: []tls.Certificate{cert},
+		MinVersion:   tls.VersionTLS13,
+	})))
+
+	RegisterBridgeRpcServer(grpcServer, NewService(grpcServer, log))
+
+	listener, err := net.Listen("tcp", "127.0.0.1:9292") // Port should be configurable from the command-line.
+	if err != nil {
+		log.WithError(err).Error("could not create listener")
+		panic(err)
+	}
+
+	return &Server{grpcServer: grpcServer, listener: listener, log: log}
+}
+
+// ListenAndServe provides the RPC service.
+func (s *Server) ListenAndServe() {
+	err := s.grpcServer.Serve(s.listener)
+	if err != nil {
+		s.log.WithError(err).Error("error serving RPC")
+	}
+}